Thread - Announcing "LMI Beginners' Sudoku Contests"

@ 2014-07-29 8:31 PM (#16212 - in reply to #16211) (#16212) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2014-07-29 8:31 PM

Rohan Rao - 2014-07-29 7:41 PM

Lots of players struggled solving this variant and I've posted one (the easiest I could think of) solving path. You can have a look here: http://rohanrao91.blogspot.in/2014/07/beginners-contest-on-lmi.html

I find your explanation about the 1 in R8C4 quite confusing. I imagine it can be struggling to try to "solve" these 2 arrows independently. If you take care of both arrows together it becomes very easy:
Considering that the maximum of the sum of both cells R9C23 is 4+5=9, then the sum of the three cells R7C45 and R8C4 has to be <9, hence must contain a 1, which can be placed only at R8C4.
There is even no need to write candidates ;)

I liked this sudoku very much, and I remember I explained this "technique" about taking care of several arrows together in a Swiss federation newsletter (...a bit sad that other swiss players taking part didn't solve this sudoku).

See you in London

Fred

@ 2014-07-29 10:13 PM (#16214 - in reply to #16212) (#16214) Top

gaurav.kjain

Posts: 52

Country : India

gaurav.kjain posted @ 2014-07-29 10:13 PM

The way I got it was

R9 C23 could be from 3/4/5 so other than 5 , 3/4 has 1 in their addition combination. which has to in one of the cells even if 5 is one of the cells.
so 1 has to be in one of the 4 cells(R7 C45 and R8 C34), which can only come at R8C4.

Since only single 1 comes in these 4 cells which will also provide other clue, that is R9 C23, one of this should contain 5.

Edited by gaurav.kjain 2014-07-29 10:16 PM

@ 2014-07-29 10:39 PM (#16215 - in reply to #16212) (#16215) Top

vopani

Posts: 739

Country : India

vopani posted @ 2014-07-29 10:39 PM

Fred76 - 2014-07-29 8:31 PM

Considering that the maximum of the sum of both cells R9C23 is 4+5=9, then the sum of the three cells R7C45 and R8C4 has to be <9, hence must contain a 1, which can be placed only at R8C4.
There is even no need to write candidates ;)

Yes, this is something even I missed. Thanks!

See you in London

Fred

Yes :-)

gaurav.kjain - 2014-07-29 10:13 PM

The way I got it was

R9 C23 could be from 3/4/5 so other than 5 , 3/4 has 1 in their addition combination. which has to in one of the cells even if 5 is one of the cells.
so 1 has to be in one of the 4 cells(R7 C45 and R8 C34), which can only come at R8C4.

Since only single 1 comes in these 4 cells which will also provide other clue, that is R9 C23, one of this should contain 5.

There are multiple ways of figuring out the bottom-left... but either ways, I think it does take a while to identify the opening, especially when you are solving under time-pressure!

@ 2014-07-30 1:02 PM (#16222 - in reply to #16156) (#16222) Top

mohanprashanth

Posts: 14

Country : India

mohanprashanth posted @ 2014-07-30 1:02 PM

Where can I view my LMI rating points?

@ 2014-07-30 1:33 PM (#16224 - in reply to #16222) (#16224) Top

vopani

Posts: 739

Country : India

vopani posted @ 2014-07-30 1:33 PM

mohanprashanth - 2014-07-30 1:02 PM

Where can I view my LMI rating points?

Click on your name: http://logicmastersindia.com/forum/view-profile.asp?action=view&uid...

@ 2014-07-30 1:35 PM (#16225 - in reply to #7911) (#16225) Top

mohanprashanth

Posts: 14

Country : India

mohanprashanth posted @ 2014-07-30 1:35 PM

Thank you

@ 2014-08-09 5:52 PM (#16307 - in reply to #16225) (#16307) Top

alkirthana

Posts: 2

Country : India

alkirthana posted @ 2014-08-09 5:52 PM

Hi, Can you tell me when is this month's beginner's sudoku contest likely to be published ?

@ 2014-08-10 12:03 AM (#16309 - in reply to #16307) (#16309) Top

prasanna16391

Posts: 1801

Country : India

prasanna16391 posted @ 2014-08-10 12:03 AM

alkirthana - 2014-08-09 5:52 PM

Hi, Can you tell me when is this month's beginner's sudoku contest likely to be published ?

Since we're all headed for the World Championships, there's nothing planned as of now, and won't be for the near future. If something does get planned, it will be announced here. You can always practice the archived ones though.

@ 2014-08-16 1:00 AM (#16348 - in reply to #7911) (#16348) Top

alkirthana

Posts: 2

Country : India

alkirthana posted @ 2014-08-16 1:00 AM

Thanks and good luck with the World Championship !

@ 2015-02-06 2:46 PM (#17650 - in reply to #7911) (#17650) Top

Yajendra

Posts: 18

Country : India

Yajendra posted @ 2015-02-06 2:46 PM

Are they held currently or not??

@ 2015-05-18 12:23 PM (#18325 - in reply to #7911) (#18325) Top

sliverbrain

Posts: 4

Country : India

sliverbrain posted @ 2015-05-18 12:23 PM

long time but there no beginners Sudoku test yet.

@ 2015-05-18 3:57 PM (#18326 - in reply to #7911) (#18326) Top

rajeshk

Posts: 542

Country : India

rajeshk posted @ 2015-05-18 3:57 PM

In fact Sudoku Mahabharat which finished last week was replica of Beginners Sudoku Test with more Classic Puzzles and with Easy Sudoku Variations. May be from the next month onward we can see more tests being conducted at LMI.


	@ 2014-07-29 8:31 PM (#16212 - in reply to #16211) (#16212) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2014-07-29 8:31 PM Rohan Rao - 2014-07-29 7:41 PM Lots of players struggled solving this variant and I've posted one (the easiest I could think of) solving path. You can have a look here: http://rohanrao91.blogspot.in/2014/07/beginners-contest-on-lmi.html I find your explanation about the 1 in R8C4 quite confusing. I imagine it can be struggling to try to "solve" these 2 arrows independently. If you take care of both arrows together it becomes very easy: Considering that the maximum of the sum of both cells R9C23 is 4+5=9, then the sum of the three cells R7C45 and R8C4 has to be <9, hence must contain a 1, which can be placed only at R8C4. There is even no need to write candidates ;) I liked this sudoku very much, and I remember I explained this "technique" about taking care of several arrows together in a Swiss federation newsletter (...a bit sad that other swiss players taking part didn't solve this sudoku). See you in London Fred
	@ 2014-07-29 10:13 PM (#16214 - in reply to #16212) (#16214) Top
gaurav.kjain Posts: 52 Country : India	gaurav.kjain posted @ 2014-07-29 10:13 PM The way I got it was R9 C23 could be from 3/4/5 so other than 5 , 3/4 has 1 in their addition combination. which has to in one of the cells even if 5 is one of the cells. so 1 has to be in one of the 4 cells(R7 C45 and R8 C34), which can only come at R8C4. Since only single 1 comes in these 4 cells which will also provide other clue, that is R9 C23, one of this should contain 5. Edited by gaurav.kjain 2014-07-29 10:16 PM
	@ 2014-07-29 10:39 PM (#16215 - in reply to #16212) (#16215) Top
vopani Posts: 739 Country : India	vopani posted @ 2014-07-29 10:39 PM Fred76 - 2014-07-29 8:31 PM Considering that the maximum of the sum of both cells R9C23 is 4+5=9, then the sum of the three cells R7C45 and R8C4 has to be <9, hence must contain a 1, which can be placed only at R8C4. There is even no need to write candidates ;) Yes, this is something even I missed. Thanks! See you in London Fred Yes :-) gaurav.kjain - 2014-07-29 10:13 PM The way I got it was R9 C23 could be from 3/4/5 so other than 5 , 3/4 has 1 in their addition combination. which has to in one of the cells even if 5 is one of the cells. so 1 has to be in one of the 4 cells(R7 C45 and R8 C34), which can only come at R8C4. Since only single 1 comes in these 4 cells which will also provide other clue, that is R9 C23, one of this should contain 5. There are multiple ways of figuring out the bottom-left... but either ways, I think it does take a while to identify the opening, especially when you are solving under time-pressure!
	@ 2014-07-30 1:02 PM (#16222 - in reply to #16156) (#16222) Top
mohanprashanth Posts: 14 Country : India	mohanprashanth posted @ 2014-07-30 1:02 PM Where can I view my LMI rating points?
	@ 2014-07-30 1:33 PM (#16224 - in reply to #16222) (#16224) Top
vopani Posts: 739 Country : India	vopani posted @ 2014-07-30 1:33 PM mohanprashanth - 2014-07-30 1:02 PM Where can I view my LMI rating points? Click on your name: http://logicmastersindia.com/forum/view-profile.asp?action=view&uid...
	@ 2014-07-30 1:35 PM (#16225 - in reply to #7911) (#16225) Top
mohanprashanth Posts: 14 Country : India	mohanprashanth posted @ 2014-07-30 1:35 PM Thank you
	@ 2014-08-09 5:52 PM (#16307 - in reply to #16225) (#16307) Top
alkirthana Posts: 2 Country : India	alkirthana posted @ 2014-08-09 5:52 PM Hi, Can you tell me when is this month's beginner's sudoku contest likely to be published ?
	@ 2014-08-10 12:03 AM (#16309 - in reply to #16307) (#16309) Top
prasanna16391 Posts: 1801 Country : India	prasanna16391 posted @ 2014-08-10 12:03 AM alkirthana - 2014-08-09 5:52 PM Hi, Can you tell me when is this month's beginner's sudoku contest likely to be published ? Since we're all headed for the World Championships, there's nothing planned as of now, and won't be for the near future. If something does get planned, it will be announced here. You can always practice the archived ones though.
	@ 2014-08-16 1:00 AM (#16348 - in reply to #7911) (#16348) Top
alkirthana Posts: 2 Country : India	alkirthana posted @ 2014-08-16 1:00 AM Thanks and good luck with the World Championship !
	@ 2015-02-06 2:46 PM (#17650 - in reply to #7911) (#17650) Top
Yajendra Posts: 18 Country : India	Yajendra posted @ 2015-02-06 2:46 PM Are they held currently or not??
	@ 2015-05-18 12:23 PM (#18325 - in reply to #7911) (#18325) Top
sliverbrain Posts: 4 Country : India	sliverbrain posted @ 2015-05-18 12:23 PM long time but there no beginners Sudoku test yet.
	@ 2015-05-18 3:57 PM (#18326 - in reply to #7911) (#18326) Top
rajeshk Posts: 542 Country : India	rajeshk posted @ 2015-05-18 3:57 PM In fact Sudoku Mahabharat which finished last week was replica of Beginners Sudoku Test with more Classic Puzzles and with Easy Sudoku Variations. May be from the next month onward we can see more tests being conducted at LMI.